Add stackviz directory to the list of find_files

This patch will add stackviz directory to be skipped to be gzipped
when collect logs

Change-Id: I08dabcf69ef70705ce5d4732195e14c5246c911a

test-log-collect.sh

@@ -164,7 +164,7 @@ function find_files {
     ! -name '*.html' \
     ! -name '*.subunit' \
     ! -name "*.journal" \
-    ! -name 'ansible.sqlite'
+    ! -name 'ansible.sqlite' | grep -v 'stackviz'
 }
 
 function rename_files {